module tb_pararellAdder();
reg [3:0] A;
reg [3:0] B;
reg Cin;
wire Cout;
wire [3:0] s;

ParallelAdder dut(A,B,Cin,s,Cout);
initial begin
    $dumpfile("tb_pa");
    $dumpvars;
    A=4;
    B=15;
    Cin=0;
    #100;
    A=3;
    B=10;
    Cin=1;#100;
    $finish;
end
endmodule
